It's not too bad. I like it better than the standard run of the mill "stick" mods. This one is lighter (it's all plastic except, of course, the contacts), takes an 18650 (means it'll last a lot longer than a "stick" battery, and batteries can be swapped to prevent being tethered to a wall when charging), and has 3 settings (3.2V, 3.4V, and bypass). The tank it comes with is a little lackluster, but it is VERY sturdy. Of course, any 510 tank can be used on top of it, so... I guess my only complaint would be the button. I wish it were a bit clickier.